diff --git a/fs/ocfs2/file.h b/fs/ocfs2/file.h
index 79115c9..36fe27f 100644
--- a/fs/ocfs2/file.h
+++ b/fs/ocfs2/file.h
@@ -62,4 +62,7 @@
 int ocfs2_update_inode_atime(struct inode *inode,
 			     struct buffer_head *bh);
 
+int ocfs2_change_file_space(struct file *file, unsigned int cmd,
+			    struct ocfs2_space_resv *sr);
+
 #endif /* OCFS2_FILE_H */